for that country. >>> egyptian president mohamed morsi is asking for a dialogue with protesters. demonstrators are upset about the constitutional declaration that morsi is granted more power. he said he will go through with it. >>> a toxic cloud forced a mass evacuation in downtown buenos aires, argentina today. a shipping container filled with pesticides exploded and caused a cloud of gas. people ran out of offices with their faces covered in an effort to escape the fumes. many people complained that the sulfur-like odor called mild respiratory irritation. the fire is now reportedly und control. >>> new of a change to the metro's silver line that could cost millions. they said it's a crucial improfit for safety. adam tuss is live at the lafaunt metro station with more on how this could impact computers. adam? >> reporter: doreen, plans are changing for the silver line, and not only could it cost the transit agency more, but it could also leave some riders with a very long wait. here's the problem. this is what's known as an interlocking, or in plain speak a place where trains can turn around.